The official Los Angeles Alamos National Laboratory recently released news that the laboratory advanced solar physics center of the research team by spraying ordinary glass thin quantum dots, solar energy conversion efficiency has been obtained, which can be built in Glass windows into low-cost photovoltaic power generation system.

People are always trying to capture the solar energy falling on the window with multiple connected solar modules. "And using a mechanism to send the captured sunlight directly to the solar cell at the edge of the window not only made the installation much easier and less expensive, and now we do it." Victor Kerimoto, a nanotechnology engineer who led the study, Husband said.

The Klimov team found that an ultra-thin quantum dot coating can turn ordinary glass into solar panels and remain functional for as long as 14 years, and the energy conversion efficiency is now as high as 1.9%, albeit 6 There are still gaps, but they can reach that goal soon. And spraying quantum dots onto window glass is as easy as spraying a slurry of quantum dots and PVP polymer onto the glass with a single machine, then spreading it over a thin layer with a doctor blade.

The quantum dots used by the Klimov team contain a cadmium arsenide core and a cadmium zinc-sulfur shell, which is covered with a layer of silica to prevent oxidation of the shell layer and loss of light absorption. When the solar photons encounter quantum dots, the electrons in the shell transition from the covalent band to the conduction band, leaving holes. Electrons and holes jump to the core at the same time, where they recombine to form photons. In design, they allow the shell layer to absorb only high-energy photons so that the new photons are easily transmitted to the entire glass and quantum dots through internal reflection, eventually reaching the edge of the glass and being absorbed by the solar cells there.

Researchers said the new study shows that quantum dots and other nanocrystals can be used to produce large-area and cost-effective collection of scattered light source device, the relevant tests on absorbance and stability also showed that such devices compared with other solar cells Not inferior. The coatings are also recyclable, and glass is readily available, making it the first choice for high-rise buildings where there is not enough room on the roof to install solar panels. They will then continue to adjust the quantum dot concentration to improve light absorption properties and conversion efficiency for early use.

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